AUTH SERVER

- set CMAke project

- add Drogon submodule

- add json and Catch2 submodule

- add health check endpoint

-RAII SqliteDb

- Verify DB and HTTP some work

.gitmodules

@@ -0,0 +1,9 @@
+[submodule "submodules/drogon"]
+	path = submodules/drogon
+	url = https://github.com/drogonframework/drogon.git
+[submodule "submodules/json"]
+	path = submodules/json
+	url = https://github.com/nlohmann/json.git
+[submodule "submodules/Catch2"]
+	path = submodules/Catch2
+	url = https://github.com/catchorg/Catch2.git